1 files changed, 39 insertions, 6 deletions
diff --git a/parse_test.go b/parse_test.go
index 9aad2e3..00b0875 100644
--- a/parse_test.go
+++ b/parse_test.go
@@ -371,7 +371,7 @@ func TestNonsenseKey(t *testing.T) {
 	assert.Error(t, err)
 }
 
-func TestMissingValue(t *testing.T) {
+func TestMissingValueAtEnd(t *testing.T) {
 	var args struct {
 		Foo string
 	}
@@ -379,6 +379,24 @@ func TestMissingValue(t *testing.T) {
 	assert.Error(t, err)
 }
 
+func TestMissingValueInMIddle(t *testing.T) {
+	var args struct {
+		Foo string
+		Bar string
+	}
+	err := parse("--foo --bar=abc", &args)
+	assert.Error(t, err)
+}
+
+func TestNegativeValue(t *testing.T) {
+	var args struct {
+		Foo int
+	}
+	err := parse("--foo -123", &args)
+	require.NoError(t, err)
+	assert.Equal(t, -123, args.Foo)
+}
+
 func TestInvalidInt(t *testing.T) {
 	var args struct {
 		Foo int
@@ -462,11 +480,10 @@ func TestPanicOnNonPointer(t *testing.T) {
 	})
 }
 
-func TestPanicOnNonStruct(t *testing.T) {
+func TestErrorOnNonStruct(t *testing.T) {
 	var args string
-	assert.Panics(t, func() {
-		_ = parse("", &args)
-	})
+	err := parse("", &args)
+	assert.Error(t, err)
 }
 
 func TestUnsupportedType(t *testing.T) {
@@ -540,6 +557,15 @@ func TestEnvironmentVariable(t *testing.T) {
 	assert.Equal(t, "bar", args.Foo)
 }
 
+func TestEnvironmentVariableNotPresent(t *testing.T) {
+	var args struct {
+		NotPresent string `arg:"env"`
+	}
+	os.Args = []string{"example"}
+	MustParse(&args)
+	assert.Equal(t, "", args.NotPresent)
+}
+
 func TestEnvironmentVariableOverrideName(t *testing.T) {
 	var args struct {
 		Foo string `arg:"env:BAZ"`
@@ -584,7 +610,7 @@ func TestEnvironmentVariableSliceArgumentString(t *testing.T) {
 	var args struct {
 		Foo []string `arg:"env"`
 	}
-	setenv(t, "FOO", "bar,\"baz, qux\"")
+	setenv(t, "FOO", `bar,"baz, qux"`)
 	MustParse(&args)
 	assert.Equal(t, []string{"bar", "baz, qux"}, args.Foo)
 }
@@ -985,3 +1011,10 @@ func TestReuseParser(t *testing.T) {
 	err = p.Parse([]string{})
 	assert.Error(t, err)
 }
+
+func TestVersion(t *testing.T) {
+	var args struct{}
+	err := parse("--version", &args)
+	assert.Equal(t, ErrVersion, err)
+
+}