Add unit tests for monitor.go type conversion utilities
Add 97 test cases for four utility functions in monitor.go: - stringValue (30 cases): Type-to-string conversion for various Go types including string, int types, float types, json.Number, fmt.Stringer - anyToInt64 (34 cases): Interface-to-int64 conversion with overflow handling, string parsing, and json.Number support - parseInterfaceStat (15 cases): Interface stat map parsing for network interface statistics - extractGuestOSInfo (18 cases): QEMU guest agent OS info extraction with fallback logic for various Linux distros, Windows, FreeBSD Coverage for these functions: 0% → 100% Package coverage: 37.5% → 38.5%
This commit is contained in:
rcourtman
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1 changed files with 358 additions and 0 deletions
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@ -1,6 +1,7 @@
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package monitoring
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import (
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"encoding/json"
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"errors"
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"fmt"
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"math"
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@ -535,3 +536,360 @@ func stringSlicesEqual(a, b []string) bool {
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}
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return true
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}
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// customStringer is a test type implementing fmt.Stringer for testing the fmt.Stringer case
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type customStringer struct {
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value string
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}
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func (c customStringer) String() string {
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return c.value
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}
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func TestStringValue(t *testing.T) {
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t.Parallel()
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cases := []struct {
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name string
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input interface{}
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want string
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}{
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// String inputs
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{name: "plain string", input: "hello", want: "hello"},
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{name: "string with whitespace", input: " hello ", want: "hello"},
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{name: "empty string", input: "", want: ""},
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{name: "whitespace only string", input: " ", want: ""},
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// Numeric inputs - integers
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{name: "int", input: 42, want: "42"},
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{name: "int zero", input: 0, want: "0"},
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{name: "int negative", input: -123, want: "-123"},
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{name: "int32", input: int32(2147483647), want: "2147483647"},
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{name: "int32 negative", input: int32(-1), want: "-1"},
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{name: "int64", input: int64(9223372036854775807), want: "9223372036854775807"},
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{name: "int64 negative", input: int64(-9223372036854775808), want: "-9223372036854775808"},
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{name: "uint32", input: uint32(4294967295), want: "4294967295"},
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{name: "uint64", input: uint64(18446744073709551615), want: "18446744073709551615"},
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// Numeric inputs - floats
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{name: "float64 whole", input: float64(42), want: "42"},
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{name: "float64 decimal", input: float64(3.14159), want: "3.14159"},
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{name: "float64 negative", input: float64(-1.5), want: "-1.5"},
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{name: "float64 zero", input: float64(0), want: "0"},
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{name: "float32 whole", input: float32(42), want: "42"},
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{name: "float32 decimal", input: float32(2.5), want: "2.5"},
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// json.Number
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{name: "json.Number int", input: json.Number("12345"), want: "12345"},
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{name: "json.Number float", input: json.Number("3.14"), want: "3.14"},
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// fmt.Stringer (custom type)
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{name: "fmt.Stringer", input: customStringer{value: "custom"}, want: "custom"},
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{name: "fmt.Stringer with whitespace", input: customStringer{value: " trimmed "}, want: "trimmed"},
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{name: "fmt.Stringer empty", input: customStringer{value: ""}, want: ""},
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// Unsupported types
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{name: "nil", input: nil, want: ""},
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{name: "bool true", input: true, want: ""},
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{name: "bool false", input: false, want: ""},
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{name: "slice", input: []int{1, 2, 3}, want: ""},
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{name: "map", input: map[string]int{"a": 1}, want: ""},
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{name: "struct", input: struct{ X int }{X: 1}, want: ""},
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}
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for _, tc := range cases {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := stringValue(tc.input); got != tc.want {
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t.Fatalf("stringValue(%v) = %q, want %q", tc.input, got, tc.want)
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}
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})
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}
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}
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func TestAnyToInt64(t *testing.T) {
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t.Parallel()
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cases := []struct {
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name string
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input interface{}
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want int64
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}{
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// Integer types
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{name: "int positive", input: 42, want: 42},
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{name: "int zero", input: 0, want: 0},
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{name: "int negative", input: -123, want: -123},
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{name: "int32 positive", input: int32(100), want: 100},
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{name: "int32 max", input: int32(2147483647), want: 2147483647},
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{name: "int32 min", input: int32(-2147483648), want: -2147483648},
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{name: "int64 positive", input: int64(9223372036854775807), want: 9223372036854775807},
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{name: "int64 negative", input: int64(-9223372036854775808), want: -9223372036854775808},
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{name: "uint32", input: uint32(4294967295), want: 4294967295},
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// uint64 edge cases
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{name: "uint64 normal", input: uint64(1000), want: 1000},
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{name: "uint64 max int64", input: uint64(9223372036854775807), want: 9223372036854775807},
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{name: "uint64 overflow", input: uint64(18446744073709551615), want: math.MaxInt64},
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// Float types (truncated to int64)
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{name: "float64 whole", input: float64(42), want: 42},
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{name: "float64 truncated", input: float64(3.9), want: 3},
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{name: "float64 negative truncated", input: float64(-2.9), want: -2},
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{name: "float64 zero", input: float64(0), want: 0},
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{name: "float32 whole", input: float32(100), want: 100},
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{name: "float32 truncated", input: float32(5.7), want: 5},
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// String parsing
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{name: "string int", input: "12345", want: 12345},
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{name: "string negative", input: "-999", want: -999},
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{name: "string zero", input: "0", want: 0},
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{name: "string empty", input: "", want: 0},
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{name: "string float", input: "3.14", want: 3},
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{name: "string invalid", input: "abc", want: 0},
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{name: "string mixed", input: "123abc", want: 0},
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// json.Number
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{name: "json.Number int", input: json.Number("67890"), want: 67890},
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{name: "json.Number negative", input: json.Number("-500"), want: -500},
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{name: "json.Number float", input: json.Number("2.718"), want: 2},
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// Unsupported types
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{name: "nil", input: nil, want: 0},
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{name: "bool true", input: true, want: 0},
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{name: "bool false", input: false, want: 0},
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{name: "slice", input: []int{1, 2, 3}, want: 0},
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{name: "map", input: map[string]int{"a": 1}, want: 0},
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}
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for _, tc := range cases {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := anyToInt64(tc.input); got != tc.want {
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t.Fatalf("anyToInt64(%v) = %d, want %d", tc.input, got, tc.want)
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}
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})
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}
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}
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func TestParseInterfaceStat(t *testing.T) {
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t.Parallel()
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cases := []struct {
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name string
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stats interface{}
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key string
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want int64
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}{
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// Nil and invalid stats
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{name: "nil stats", stats: nil, key: "bytes", want: 0},
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{name: "non-map stats", stats: "not a map", key: "bytes", want: 0},
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{name: "int stats", stats: 123, key: "bytes", want: 0},
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// Missing key
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{name: "missing key", stats: map[string]interface{}{"packets": 100}, key: "bytes", want: 0},
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{name: "empty map", stats: map[string]interface{}{}, key: "bytes", want: 0},
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// Valid keys with various types
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{name: "int value", stats: map[string]interface{}{"bytes": 1000}, key: "bytes", want: 1000},
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{name: "int64 value", stats: map[string]interface{}{"bytes": int64(5000000000)}, key: "bytes", want: 5000000000},
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{name: "float64 value", stats: map[string]interface{}{"bytes": float64(2048.5)}, key: "bytes", want: 2048},
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{name: "string value", stats: map[string]interface{}{"bytes": "4096"}, key: "bytes", want: 4096},
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{name: "json.Number value", stats: map[string]interface{}{"bytes": json.Number("8192")}, key: "bytes", want: 8192},
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// Different keys
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{name: "packets key", stats: map[string]interface{}{"packets": 500, "bytes": 1000}, key: "packets", want: 500},
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{name: "errors key", stats: map[string]interface{}{"errors": 3}, key: "errors", want: 3},
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// Edge cases
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{name: "zero value", stats: map[string]interface{}{"bytes": 0}, key: "bytes", want: 0},
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{name: "negative value", stats: map[string]interface{}{"bytes": -100}, key: "bytes", want: -100},
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}
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for _, tc := range cases {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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if got := parseInterfaceStat(tc.stats, tc.key); got != tc.want {
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t.Fatalf("parseInterfaceStat(%v, %q) = %d, want %d", tc.stats, tc.key, got, tc.want)
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}
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})
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}
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}
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func TestExtractGuestOSInfo(t *testing.T) {
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t.Parallel()
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cases := []struct {
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name string
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data map[string]interface{}
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wantName string
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wantVersion string
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}{
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// Nil and empty
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{name: "nil data", data: nil, wantName: "", wantVersion: ""},
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{name: "empty map", data: map[string]interface{}{}, wantName: "", wantVersion: ""},
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// Standard Linux os-release fields
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{
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name: "standard linux",
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data: map[string]interface{}{
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"name": "Debian GNU/Linux",
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"version": "12 (bookworm)",
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"version-id": "12",
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},
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wantName: "Debian GNU/Linux",
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wantVersion: "12 (bookworm)",
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},
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{
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name: "ubuntu with pretty-name",
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data: map[string]interface{}{
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"name": "Ubuntu",
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"pretty-name": "Ubuntu 22.04.3 LTS",
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"version": "22.04.3 LTS (Jammy Jellyfish)",
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"version-id": "22.04",
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},
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wantName: "Ubuntu",
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wantVersion: "22.04.3 LTS (Jammy Jellyfish)",
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},
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// Fallback scenarios
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{
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name: "name fallback to pretty-name",
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data: map[string]interface{}{
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"pretty-name": "Alpine Linux v3.18",
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"version-id": "3.18",
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},
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wantName: "Alpine Linux v3.18",
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wantVersion: "3.18",
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},
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{
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name: "name fallback to id",
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data: map[string]interface{}{
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"id": "alpine",
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"version-id": "3.18",
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},
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wantName: "alpine",
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wantVersion: "3.18",
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},
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{
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name: "version fallback to version-id",
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data: map[string]interface{}{
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"name": "Fedora",
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"version-id": "38",
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},
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wantName: "Fedora",
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wantVersion: "38",
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},
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{
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name: "version fallback to pretty-name when different",
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data: map[string]interface{}{
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"name": "Rocky Linux",
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"pretty-name": "Rocky Linux 9.2 (Blue Onyx)",
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},
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wantName: "Rocky Linux",
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wantVersion: "Rocky Linux 9.2 (Blue Onyx)",
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},
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{
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name: "version fallback to kernel-release",
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data: map[string]interface{}{
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"name": "Linux",
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"kernel-release": "5.15.0-generic",
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},
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wantName: "Linux",
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wantVersion: "5.15.0-generic",
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},
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// Special case: version equals name
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{
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name: "version equals name cleared",
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data: map[string]interface{}{
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"name": "CentOS",
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"version": "CentOS",
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},
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wantName: "CentOS",
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wantVersion: "",
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},
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// Wrapped in "result" field (QEMU guest agent format)
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{
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name: "wrapped in result",
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data: map[string]interface{}{
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"result": map[string]interface{}{
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"name": "Arch Linux",
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"version-id": "rolling",
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},
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},
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wantName: "Arch Linux",
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wantVersion: "rolling",
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},
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{
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name: "result not a map",
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data: map[string]interface{}{
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"result": "not a map",
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"name": "Windows",
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},
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wantName: "Windows",
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wantVersion: "",
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},
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// Windows-like data
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{
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name: "windows style",
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data: map[string]interface{}{
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"name": "Microsoft Windows",
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"pretty-name": "Windows 11 Pro",
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"version": "22H2",
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},
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wantName: "Microsoft Windows",
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wantVersion: "22H2",
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},
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// FreeBSD
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{
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name: "freebsd",
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data: map[string]interface{}{
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"name": "FreeBSD",
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"version": "13.2-RELEASE",
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"version-id": "13.2",
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},
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wantName: "FreeBSD",
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wantVersion: "13.2-RELEASE",
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},
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// Whitespace handling
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{
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name: "whitespace trimmed",
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data: map[string]interface{}{
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"name": " Debian ",
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"version": " 12 ",
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},
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wantName: "Debian",
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wantVersion: "12",
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},
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// Non-string types converted
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{
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name: "numeric version",
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data: map[string]interface{}{
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"name": "Custom OS",
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"version": float64(10),
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},
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wantName: "Custom OS",
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wantVersion: "10",
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},
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}
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for _, tc := range cases {
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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gotName, gotVersion := extractGuestOSInfo(tc.data)
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if gotName != tc.wantName || gotVersion != tc.wantVersion {
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t.Fatalf("extractGuestOSInfo(%v) = (%q, %q), want (%q, %q)",
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tc.data, gotName, gotVersion, tc.wantName, tc.wantVersion)
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}
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})
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}
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}
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