fix(fs/value): Add validator for feature state string value (#112)

* fix(fs/value): Validate feature state value

Prevent feature state values with leading or trailing whitespace, as the API
removes them, leading to state mismatches.

* tests(fs/value): Add test for regex validator

* infra(ci/tests): Update terraform versions

.github/workflows/test.yml

@@ -20,7 +20,7 @@ permissions:
 env:
   # Go language version to use for building. This value should also be updated
   # in the release workflow if changed.
-  GO_VERSION: '1.19'
+  GO_VERSION: '1.20'
 
 jobs:
   # Ensure project builds before running testing matrix
@@ -63,8 +63,8 @@ jobs:
       matrix:
         # list whatever Terraform versions here you would like to support
         terraform:
-          - '1.0.*'
-          - '1.1.*'
+          - '1.4.*'
+          - '1.5.*'
     steps:
       - uses: actions/setup-go@v4
         with:

flagsmith/resource_feature_state.go

@@ -3,6 +3,7 @@ package flagsmith
 import (
 	"context"
 	"fmt"
+	"regexp"
 	"github.com/hashicorp/terraform-plugin-framework/path"
 	"github.com/hashicorp/terraform-plugin-framework/resource"
 	"github.com/hashicorp/terraform-plugin-framework/tfsdk"
@@ -94,6 +95,13 @@ func (t *featureStateResource) Schema(ctx context.Context, req resource.SchemaRe
 					"string_value": schema.StringAttribute{
 						MarkdownDescription: "String value of the feature if the type is `unicode`.",
 						Optional:            true,
+						Validators: []validator.String{
+							// Validate string value satisfies the regular expression for no leading or trailing whitespace
+							stringvalidator.RegexMatches(
+								regexp.MustCompile(`^\S[\s\S]*\S$`),
+								"Leading and trailing whitespace is not allowed",
+							),
+						},
 					},
 					"integer_value": schema.Int64Attribute{
 						MarkdownDescription: "Integer value of the feature if the type is `int`",

flagsmith/resource_feature_state_test.go

@@ -22,6 +22,12 @@ func TestAccEnvironmentFeatureStateResource(t *testing.T) {
 				Config: testAccInvalidFeatureStateValueConfig(),
 				ExpectError: regexp.MustCompile(`Exactly one of these attributes must be configured:\n\[feature_state_value.string_value,feature_state_value.integer_value,feature_state_value.boolean_value\]`),
 
+			},
+			// Test feature State string value validator
+			{
+				Config: testAccEnvironmentFeatureStateResourceConfig(" some_value ", true),
+				ExpectError: regexp.MustCompile(`Attribute feature_state_value.string_value Leading and trailing whitespace is\n.*not allowed`),
+
 			},
 
 			// Create and Read testing