1 files changed, 170 insertions, 0 deletions
diff --git a/common/maps/params_test.go b/common/maps/params_test.go
new file mode 100644
index 000000000..a070e6f60
--- /dev/null
+++ b/common/maps/params_test.go
@@ -0,0 +1,170 @@
+// Copyright 2019 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package maps
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestGetNestedParam(t *testing.T) {
+	m := map[string]any{
+		"string":          "value",
+		"first":           1,
+		"with_underscore": 2,
+		"nested": map[string]any{
+			"color": "blue",
+			"nestednested": map[string]any{
+				"color": "green",
+			},
+		},
+	}
+
+	c := qt.New(t)
+
+	must := func(keyStr, separator string, candidates ...Params) any {
+		v, err := GetNestedParam(keyStr, separator, candidates...)
+		c.Assert(err, qt.IsNil)
+		return v
+	}
+
+	c.Assert(must("first", "_", m), qt.Equals, 1)
+	c.Assert(must("First", "_", m), qt.Equals, 1)
+	c.Assert(must("with_underscore", "_", m), qt.Equals, 2)
+	c.Assert(must("nested_color", "_", m), qt.Equals, "blue")
+	c.Assert(must("nested.nestednested.color", ".", m), qt.Equals, "green")
+	c.Assert(must("string.name", ".", m), qt.IsNil)
+	c.Assert(must("nested.foo", ".", m), qt.IsNil)
+}
+
+// https://github.com/gohugoio/hugo/issues/7903
+func TestGetNestedParamFnNestedNewKey(t *testing.T) {
+	c := qt.New(t)
+
+	nested := map[string]any{
+		"color": "blue",
+	}
+	m := map[string]any{
+		"nested": nested,
+	}
+
+	existing, nestedKey, owner, err := GetNestedParamFn("nested.new", ".", func(key string) any {
+		return m[key]
+	})
+
+	c.Assert(err, qt.IsNil)
+	c.Assert(existing, qt.IsNil)
+	c.Assert(nestedKey, qt.Equals, "new")
+	c.Assert(owner, qt.DeepEquals, nested)
+}
+
+func TestParamsSetAndMerge(t *testing.T) {
+	c := qt.New(t)
+
+	createParamsPair := func() (Params, Params) {
+		p1 := Params{"a": "av", "c": "cv", "nested": Params{"al2": "al2v", "cl2": "cl2v"}}
+		p2 := Params{"b": "bv", "a": "abv", "nested": Params{"bl2": "bl2v", "al2": "al2bv"}, mergeStrategyKey: ParamsMergeStrategyDeep}
+		return p1, p2
+	}
+
+	p1, p2 := createParamsPair()
+
+	p1.Set(p2)
+
+	c.Assert(p1, qt.DeepEquals, Params{
+		"a": "abv",
+		"c": "cv",
+		"nested": Params{
+			"al2": "al2bv",
+			"cl2": "cl2v",
+			"bl2": "bl2v",
+		},
+		"b":              "bv",
+		mergeStrategyKey: ParamsMergeStrategyDeep,
+	})
+
+	p1, p2 = createParamsPair()
+
+	p1.Merge(p2)
+
+	// Default is to do a shallow merge.
+	c.Assert(p1, qt.DeepEquals, Params{
+		"c": "cv",
+		"nested": Params{
+			"al2": "al2v",
+			"cl2": "cl2v",
+		},
+		"b": "bv",
+		"a": "av",
+	})
+
+	p1, p2 = createParamsPair()
+	p1.SetDefaultMergeStrategy(ParamsMergeStrategyNone)
+	p1.Merge(p2)
+	p1.DeleteMergeStrategy()
+
+	c.Assert(p1, qt.DeepEquals, Params{
+		"a": "av",
+		"c": "cv",
+		"nested": Params{
+			"al2": "al2v",
+			"cl2": "cl2v",
+		},
+	})
+
+	p1, p2 = createParamsPair()
+	p1.SetDefaultMergeStrategy(ParamsMergeStrategyShallow)
+	p1.Merge(p2)
+	p1.DeleteMergeStrategy()
+
+	c.Assert(p1, qt.DeepEquals, Params{
+		"a": "av",
+		"c": "cv",
+		"nested": Params{
+			"al2": "al2v",
+			"cl2": "cl2v",
+		},
+		"b": "bv",
+	})
+
+	p1, p2 = createParamsPair()
+	p1.SetDefaultMergeStrategy(ParamsMergeStrategyDeep)
+	p1.Merge(p2)
+	p1.DeleteMergeStrategy()
+
+	c.Assert(p1, qt.DeepEquals, Params{
+		"nested": Params{
+			"al2": "al2v",
+			"cl2": "cl2v",
+			"bl2": "bl2v",
+		},
+		"b": "bv",
+		"a": "av",
+		"c": "cv",
+	})
+
+}
+
+func TestParamsIsZero(t *testing.T) {
+	c := qt.New(t)
+
+	var nilParams Params
+
+	c.Assert(Params{}.IsZero(), qt.IsTrue)
+	c.Assert(nilParams.IsZero(), qt.IsTrue)
+	c.Assert(Params{"foo": "bar"}.IsZero(), qt.IsFalse)
+	c.Assert(Params{"_merge": "foo", "foo": "bar"}.IsZero(), qt.IsFalse)
+	c.Assert(Params{"_merge": "foo"}.IsZero(), qt.IsTrue)
+}