dynamic block MinItems MaxItems validation test

terraform/context_validate_test.go

@@ -2008,3 +2008,95 @@ func TestContext2Validate_sensitiveProvisionerConfig(t *testing.T) {
 		t.Fatal("ValidateProvisionerConfig not called")
 	}
 }
+
+func TestContext2Plan_validateMinMaxDynamicBlock(t *testing.T) {
+	p := new(MockProvider)
+	p.GetProviderSchemaResponse = getProviderSchemaResponseFromProviderSchema(&ProviderSchema{
+		ResourceTypes: map[string]*configschema.Block{
+			"test_instance": {
+				Attributes: map[string]*configschema.Attribute{
+					"id": {
+						Type:     cty.String,
+						Computed: true,
+					},
+					"things": {
+						Type:     cty.List(cty.String),
+						Computed: true,
+					},
+				},
+				BlockTypes: map[string]*configschema.NestedBlock{
+					"foo": {
+						Block: configschema.Block{
+							Attributes: map[string]*configschema.Attribute{
+								"bar": {Type: cty.String, Optional: true},
+							},
+						},
+						Nesting:  configschema.NestingList,
+						MinItems: 2,
+						MaxItems: 3,
+					},
+				},
+			},
+		},
+	})
+
+	m := testModuleInline(t, map[string]string{
+		"main.tf": `
+resource "test_instance" "a" {
+  // MinItems 2
+  foo {
+    bar = "a"
+  }
+  foo {
+    bar = "b"
+  }
+}
+
+resource "test_instance" "b" {
+  // one dymamic block can satisfy MinItems of 2
+  dynamic "foo" {
+	for_each = test_instance.a.things
+	content {
+	  bar = foo.value
+	}
+  }
+}
+
+resource "test_instance" "c" {
+  // we may have more than MaxItems dynamic blocks when they are unknown
+  foo {
+    bar = "b"
+  }
+  dynamic "foo" {
+    for_each = test_instance.a.things
+    content {
+      bar = foo.value
+    }
+  }
+  dynamic "foo" {
+    for_each = test_instance.a.things
+    content {
+      bar = "${foo.value}-2"
+    }
+  }
+  dynamic "foo" {
+    for_each = test_instance.b.things
+    content {
+      bar = foo.value
+    }
+  }
+}
+`})
+
+	ctx := testContext2(t, &ContextOpts{
+		Config: m,
+		Providers: map[addrs.Provider]providers.Factory{
+			addrs.NewDefaultProvider("test"): testProviderFuncFixed(p),
+		},
+	})
+
+	diags := ctx.Validate()
+	if diags.HasErrors() {
+		t.Fatal(diags.ErrWithWarnings())
+	}
+}