Added split string operator

pkg/yqlib/operator_strings_test.go

@@ -13,6 +13,35 @@ var stringsOperatorScenarios = []expressionScenario{
 			"D0, P[], (!!str)::cat; meow; 1; ; true\n",
 		},
 	},
+	{
+		description: "Split strings",
+		document:    `"cat; meow; 1; ; true"`,
+		expression:  `split("; ")`,
+		expected: []string{
+			"D0, P[], (!!seq)::- cat\n- meow\n- \"1\"\n- \"\"\n- \"true\"\n",
+		},
+	},
+	{
+		description: "Split strings one match",
+		document:    `"word"`,
+		expression:  `split("; ")`,
+		expected: []string{
+			"D0, P[], (!!seq)::- word\n",
+		},
+	},
+	{
+		skipDoc:    true,
+		document:   `""`,
+		expression: `split("; ")`,
+		expected: []string{
+			"D0, P[], (!!seq)::[]\n", // dont actually want this, just not to error
+		},
+	},
+	{
+		skipDoc:    true,
+		expression: `split("; ")`,
+		expected:   []string{},
+	},
 }
 
 func TestStringsOperatorScenarios(t *testing.T) {