chore: add more tests (#3260)

core/stat/internal/cgroup_linux.go

@@ -284,6 +284,7 @@ func runningInUserNS() bool {
 		if a == 0 && b == 0 && c == math.MaxUint32 {
 			return
 		}
+
 		inUserNS = true
 	})
 

core/stores/builder/builder_test.go

@@ -69,3 +69,62 @@ func TestFieldNamesWithDashTagAndOptions(t *testing.T) {
 		assert.Equal(t, expected, out)
 	})
 }
+
+func TestPostgreSqlJoin(t *testing.T) {
+	// Test with empty input array
+	var input []string
+	var expectedOutput string
+	assert.Equal(t, expectedOutput, PostgreSqlJoin(input))
+
+	// Test with single element input array
+	input = []string{"foo"}
+	expectedOutput = "foo = $2"
+	assert.Equal(t, expectedOutput, PostgreSqlJoin(input))
+
+	// Test with multiple elements input array
+	input = []string{"foo", "bar", "baz"}
+	expectedOutput = "foo = $2, bar = $3, baz = $4"
+	assert.Equal(t, expectedOutput, PostgreSqlJoin(input))
+}
+
+type testStruct struct {
+	Foo string `db:"foo"`
+	Bar int    `db:"bar"`
+	Baz bool   `db:"-"`
+}
+
+func TestRawFieldNames(t *testing.T) {
+	// Test with a struct without tags
+	in := struct {
+		Foo string
+		Bar int
+	}{}
+	expectedOutput := []string{"`Foo`", "`Bar`"}
+	assert.ElementsMatch(t, expectedOutput, RawFieldNames(in))
+
+	// Test pg without db tag
+	expectedOutput = []string{"Foo", "Bar"}
+	assert.ElementsMatch(t, expectedOutput, RawFieldNames(in, true))
+
+	// Test with a struct with tags
+	input := testStruct{}
+	expectedOutput = []string{"`foo`", "`bar`"}
+	assert.ElementsMatch(t, expectedOutput, RawFieldNames(input))
+
+	// Test with nil input (pointer)
+	var nilInput *testStruct
+	assert.Panics(t, func() {
+		RawFieldNames(nilInput)
+	}, "RawFieldNames should panic with nil input")
+
+	// Test with non-struct input
+	inputInt := 42
+	assert.Panics(t, func() {
+		RawFieldNames(inputInt)
+	}, "RawFieldNames should panic with non-struct input")
+
+	// Test with PostgreSQL flag
+	input = testStruct{}
+	expectedOutput = []string{"foo", "bar"}
+	assert.ElementsMatch(t, expectedOutput, RawFieldNames(input, true))
+}