Added has operator

pkg/yqlib/operator_has_test.go

@@ -0,0 +1,48 @@
+package yqlib
+
+import (
+	"testing"
+)
+
+var hasOperatorScenarios = []expressionScenario{
+	{
+		description: "Has map key",
+		document: `- a: "yes"
+- a: ~
+- a: 
+- b: nope
+`,
+		expression: `.[] | has("a")`,
+		expected: []string{
+			"D0, P[0], (!!bool)::true\n",
+			"D0, P[1], (!!bool)::true\n",
+			"D0, P[2], (!!bool)::true\n",
+			"D0, P[3], (!!bool)::false\n",
+		},
+	},
+	{
+		dontFormatInputForDoc: true,
+		description:           "Has array index",
+		document: `- []
+- [1]
+- [1, 2]
+- [1, null]
+- [1, 2, 3]
+`,
+		expression: `.[] | has(1)`,
+		expected: []string{
+			"D0, P[0], (!!bool)::false\n",
+			"D0, P[1], (!!bool)::false\n",
+			"D0, P[2], (!!bool)::true\n",
+			"D0, P[3], (!!bool)::true\n",
+			"D0, P[4], (!!bool)::true\n",
+		},
+	},
+}
+
+func TestHasOperatorScenarios(t *testing.T) {
+	for _, tt := range hasOperatorScenarios {
+		testScenario(t, &tt)
+	}
+	documentScenarios(t, "Has", hasOperatorScenarios)
+}