Added more tests

tests/errors/UnknownFunction.q

@@ -0,0 +1,3 @@
+main() {
+	unknown()
+}

tests/errors_test.go

@@ -33,6 +33,7 @@ var errs = []struct {
 	{"MissingOperand.q", errors.MissingOperand},
 	{"MissingOperand2.q", errors.MissingOperand},
 	{"VariableAlreadyExists.q", &errors.VariableAlreadyExists{Name: "x"}},
+	{"UnknownFunction.q", &errors.UnknownFunction{Name: "unknown"}},
 	{"UnknownIdentifier.q", &errors.UnknownIdentifier{Name: "x"}},
 	{"UnknownIdentifier2.q", &errors.UnknownIdentifier{Name: "x"}},
 	{"UnknownIdentifier3.q", &errors.UnknownIdentifier{Name: "f"}},

tests/programs/branch.q

@@ -0,0 +1,81 @@
+main() {
+	x := 0
+
+	if x != 0 {
+		exit(1)
+	}
+
+	if x > 0 {
+		exit(1)
+	}
+
+	if x < 0 {
+		exit(1)
+	}
+
+	if 0 != x {
+		exit(1)
+	}
+
+	if 0 > x {
+		exit(1)
+	}
+
+	if 0 < x {
+		exit(1)
+	}
+
+	if x >= 1 {
+		exit(1)
+	}
+
+	if 1 <= x {
+		exit(1)
+	}
+
+	if x == inc(x) {
+		exit(1)
+	}
+
+	if x == dec(x) {
+		exit(1)
+	}
+
+	if inc(0) == x {
+		exit(1)
+	}
+
+	if dec(0) == x {
+		exit(1)
+	}
+
+	if inc(x) == dec(x) {
+		exit(1)
+	}
+
+	if x + 1 != inc(x) {
+		exit(1)
+	}
+
+	if x + 1 != x + 1 {
+		exit(1)
+	}
+
+	if x == 0 {
+		exit(0)
+	}
+	
+	exit(1)
+}
+
+exit(x) {
+	syscall(60, x)
+}
+
+inc(x) {
+	return x + 1
+}
+
+dec(x) {
+	return x - 1
+}