chore: add toggle package unit tests (#4577)

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

Signed-off-by: Charles-Edouard Brétéché <charled.breteche@gmail.com>

pkg/toggle/toggle_test.go

@@ -0,0 +1,176 @@
+package toggle
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_newToggle(t *testing.T) {
+	type args struct {
+		defaultValue bool
+		envVar       string
+	}
+	tests := []struct {
+		name string
+		args args
+		want *toggle
+	}{{
+		name: "nothing set",
+		want: &toggle{},
+	}, {
+		name: "default value",
+		args: args{
+			defaultValue: true,
+		},
+		want: &toggle{
+			defaultValue: true,
+		},
+	}, {
+		name: "env var",
+		args: args{
+			envVar: "test",
+		},
+		want: &toggle{
+			envVar: "test",
+		},
+	}, {
+		name: "all",
+		args: args{
+			defaultValue: true,
+			envVar:       "test",
+		},
+		want: &toggle{
+			defaultValue: true,
+			envVar:       "test",
+		},
+	}}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := newToggle(tt.args.defaultValue, tt.args.envVar)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func Test_toggle_Parse(t *testing.T) {
+	type args struct {
+		in string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{{
+		name:    "empty",
+		wantErr: false,
+	}, {
+		name:    "true",
+		args:    args{"true"},
+		wantErr: false,
+	}, {
+		name:    "false",
+		args:    args{"false"},
+		wantErr: false,
+	}, {
+		name:    "not a bool",
+		args:    args{"test"},
+		wantErr: true,
+	}}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tr := newToggle(false, "")
+			err := tr.Parse(tt.args.in)
+			if tt.wantErr {
+				assert.Error(t, err)
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
+func Test_toggle_Enabled(t *testing.T) {
+	type fields struct {
+		defaultValue bool
+		envVar       string
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		value  string
+		env    map[string]string
+		want   bool
+	}{{
+		name: "empty",
+		want: false,
+	}, {
+		name: "default true",
+		fields: fields{
+			defaultValue: true,
+		},
+		want: true,
+	}, {
+		name: "default false",
+		fields: fields{
+			defaultValue: false,
+		},
+		want: false,
+	}, {
+		name: "parse true",
+		fields: fields{
+			defaultValue: false,
+		},
+		value: "true",
+		want:  true,
+	}, {
+		name: "parse false",
+		fields: fields{
+			defaultValue: true,
+		},
+		value: "false",
+		want:  false,
+	}, {
+		name: "env true",
+		fields: fields{
+			defaultValue: false,
+			envVar:       "TOGGLE_FLAG",
+		},
+		env: map[string]string{
+			"TOGGLE_FLAG": "true",
+		},
+		want: true,
+	}, {
+		name: "env false",
+		fields: fields{
+			defaultValue: true,
+			envVar:       "TOGGLE_FLAG",
+		},
+		env: map[string]string{
+			"TOGGLE_FLAG": "false",
+		},
+		want: false,
+	}, {
+		name: "value takes precedence on env var",
+		fields: fields{
+			defaultValue: false,
+			envVar:       "TOGGLE_FLAG",
+		},
+		value: "true",
+		env: map[string]string{
+			"TOGGLE_FLAG": "false",
+		},
+		want: true,
+	}}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			for k, v := range tt.env {
+				t.Setenv(k, v)
+			}
+			tr := newToggle(tt.fields.defaultValue, tt.fields.envVar)
+			tr.Parse(tt.value)
+			got := tr.Enabled()
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}