[wip] unit testing

- tooling for code coverage measurement

.devcontainer/devcontainer.json

@@ -13,7 +13,10 @@
             "configureZshAsDefaultShell": "true"
         },
 		"ghcr.io/devcontainers/features/rust:1": {
-			"targets": "x86_64-unknown-linux-musl"
+			"targets": "x86_64-unknown-linux-gnu,x86_64-unknown-linux-musl"
+		},
+		"ghcr.io/lee-orr/rusty-dev-containers/cargo-binstall:0": {
+			"packages": "cargo-llvm-cov"
 		},
 		"ghcr.io/devcontainers-contrib/features/apt-get-packages:1": {
 			"packages": "git-flow, musl-tools"
@@ -33,7 +36,7 @@
 	// "forwardPorts": [],
 
 	// Use 'postCreateCommand' to run commands after the container is created.
-	"postCreateCommand": "rustup target install x86_64-unknown-linux-musl | :",
+	// "postCreateCommand": "rustup target install x86_64-unknown-linux-musl | :",
 
 	// Configure tool-specific properties.
 	"customizations": {
@@ -43,7 +46,9 @@
 			},
 			"extensions": [
 				"mhutchie.git-graph",
-				"Gruntfuggly.todo-tree"
+				"Gruntfuggly.todo-tree",
+				"ms-vscode.live-server",
+				"ryanluker.vscode-coverage-gutters"
 			]
 		}
 	},

.vscode/settings.json

@@ -43,6 +43,7 @@
         "black"
     ],
     "todo-tree.highlights.useColourScheme": true,
+    "coverage-gutters.coverageReportFileName": "target/llvm-cov/**/index.html",
     // // override the default setting (`cargo check --all-targets`) which produces the following error
     // // "can't find crate for `test`" when the default compilation target is a no_std target
     // "rust-analyzer.checkOnSave.allTargets": false,

.vscode/tasks.json

@@ -62,6 +62,18 @@
             "problemMatcher": "$rustc",
             "group": "test"
         },
+        {
+            "label": "Run Coverage",
+            "type": "cargo",
+            "command": "llvm-cov",
+            "args": [
+                "--lcov",
+                "--output-path" ,
+                "target/lcov.info"
+            ],
+            "problemMatcher": "$rustc",
+            "group": "test"
+        },
         // {
         //     "label": "Run Integration Tests",
         //     "type": "cargo",
@@ -79,7 +91,8 @@
             "command": "echo All Tests successful!",
             "dependsOn": [
                 "Run Unit Tests",
-                // "Run Integration Tests"
+                // "Run Integration Tests",
+                "Run Coverage",
             ],
             "dependsOrder": "sequence",
             "group": "test"