Added decoder op

pkg/yqlib/operator_encoder_decoder_test.go

@@ -0,0 +1,69 @@
+package yqlib
+
+import (
+	"testing"
+)
+
+var encoderDecoderOperatorScenarios = []expressionScenario{
+	{
+		description: "Encode value as yaml string",
+		document:    `{a: {cool: "thing"}}`,
+		expression:  `.b = (.a | to_yaml)`,
+		expected: []string{
+			`D0, P[], (doc)::{a: {cool: "thing"}, b: "{cool: \"thing\"}\n"}
+`,
+		},
+	},
+	{
+		description:    "Encode value as yaml string, using toyaml",
+		subdescription: "Does the same thing as to_yaml, matching jq naming convention.",
+		document:       `{a: {cool: "thing"}}`,
+		expression:     `.b = (.a | to_yaml)`,
+		expected: []string{
+			`D0, P[], (doc)::{a: {cool: "thing"}, b: "{cool: \"thing\"}\n"}
+`,
+		},
+	},
+	{
+		description: "Encode value as json string",
+		document:    `{a: {cool: "thing"}}`,
+		expression:  `.b = (.a | to_json)`,
+		expected: []string{
+			`D0, P[], (doc)::{a: {cool: "thing"}, b: "{\n  \"cool\": \"thing\"\n}\n"}
+`,
+		},
+	},
+	{
+		description: "Encode value as props string",
+		document:    `{a: {cool: "thing"}}`,
+		expression:  `.b = (.a | to_props)`,
+		expected: []string{
+			`D0, P[], (doc)::{a: {cool: "thing"}, b: "cool = thing\n"}
+`,
+		},
+	},
+	{
+		description: "Decode a yaml encoded string",
+		document:    `a: "foo: bar"`,
+		expression:  `.b = (.a | from_yaml)`,
+		expected: []string{
+			"D0, P[], (doc)::a: \"foo: bar\"\nb:\n    foo: bar\n",
+		},
+	},
+	{
+		description:           "Update an encoded yaml string",
+		dontFormatInputForDoc: true,
+		document:              "a: |\n  foo: bar",
+		expression:            `.a |= (from_yaml | .foo = "cat" | to_yaml)`,
+		expected: []string{
+			"D0, P[], (doc)::a: |\n    foo: cat\n",
+		},
+	},
+}
+
+func TestEncoderDecoderOperatorScenarios(t *testing.T) {
+	for _, tt := range encoderDecoderOperatorScenarios {
+		testScenario(t, &tt)
+	}
+	documentScenarios(t, "Encoder and Decoder", encoderDecoderOperatorScenarios)
+}