builtin-base: removed useless function unset(). See UNSET operator

t_builtin-base_test.go

@@ -72,3 +72,56 @@ func TestFuncBase(t *testing.T) {
 	// runTestSuiteSpec(t, section, inputs, 49)
 	runTestSuite(t, section, inputs)
 }
+
+func TestFuncBaseString(t *testing.T) {
+	section := "Builtin-Base-String"
+
+	inputs := []inputType{
+		/*   1 */ {`string(3)`, "3", nil},
+		/*   2 */ {`string(3.5)`, "3.5", nil},
+		/*   3 */ {`string(true)`, "true", nil},
+		/*   4 */ {`string(false)`, "false", nil},
+		/*   5 */ {`string("123")`, "123", nil},
+		/*   6 */ {`string(1:2)`, "1:2", nil},
+	}
+
+	// t.Setenv("EXPR_PATH", ".")
+
+	// runTestSuiteSpec(t, section, inputs, 49)
+	runTestSuite(t, section, inputs)
+}
+
+func TestFuncBaseFraction(t *testing.T) {
+	section := "Builtin-Base-Fraction"
+
+	inputs := []inputType{
+		/*   1 */ {`fract(-0.5)`, kern.NewFraction(-1, 2), nil},
+		/*   2 */ {`fract("")`, (*kern.FractionType)(nil), `bad syntax`},
+		/*   3 */ {`fract("-1")`, kern.NewFraction(-1, 1), nil},
+		/*   4 */ {`fract("+1")`, kern.NewFraction(1, 1), nil},
+		/*   5 */ {`fract("1a")`, (*kern.FractionType)(nil), `strconv.ParseInt: parsing "1a": invalid syntax`},
+		/*   6 */ {`fract(1,0)`, nil, `fract(): division by zero`},
+		/*   7 */ {`fract(5, "1")`, nil, `fract(): expected integer, got string ("1")`},
+		/*   8 */ {`fract(true)`, kern.NewFraction(1, 1), nil},
+		/*   9 */ {`fract(false)`, kern.NewFraction(0, 1), nil},
+	}
+
+	// t.Setenv("EXPR_PATH", ".")
+
+	// runTestSuiteSpec(t, section, inputs, 8)
+	runTestSuite(t, section, inputs)
+}
+
+func TestFuncBaseOthers(t *testing.T) {
+	section := "Builtin-Base-Others"
+
+	inputs := []inputType{
+		/*   1 */ {`set("a", 3); a`, int64(3), nil},
+		/*   2 */ {`set(true, 3)`, nil, `set(): the "name" parameter must be a string, got a bool (true)`},
+		// /*   3 */ {`a=3; unset("a"); a`, nil, `undefined variable or function "a"`},
+		// /*   4 */ {`unset("a")`, nil, `undefined variable or function "a"`},
+	}
+
+	// runTestSuiteSpec(t, section, inputs, 4)
+	runTestSuite(t, section, inputs)
+}