Refactor Table_Tests to the builder API (#8622)

Refactor `test/Table_Test` to the builder API. The builder API is in a new library called `Test_New` that is alongside the old `Test` library. There will be follow-up PRs that will migrate the rest of the tests. Meanwhile, let's keep these two libraries, and merge them after the last PR.

# Important Notes
- For a brief introduction into the new API, see **Prototype 1** section in #8622 (comment)
- When executing all the tests, the behavior should be the same as with the old library. With the only exception that if `ENSO_TEST_ANSI_COLORS` env var is set, the output is more colorful than it used to be.

build/build/src/enso.rs

@@ -4,6 +4,7 @@ use crate::paths::Paths;
 use crate::paths::ENSO_ENABLE_ASSERTIONS;
 use crate::paths::ENSO_META_TEST_ARGS;
 use crate::paths::ENSO_META_TEST_COMMAND;
+use crate::paths::ENSO_TEST_ANSI_COLORS;
 use crate::postgres;
 use crate::postgres::EndpointConfiguration;
 use crate::postgres::Postgresql;
@@ -121,6 +122,7 @@ impl BuiltEnso {
         ENSO_META_TEST_ARGS.set(&format!("{} --run", ir_caches.flag()))?;
 
         ENSO_ENABLE_ASSERTIONS.set("true")?;
+        ENSO_TEST_ANSI_COLORS.set("true")?;
 
         // Prepare Engine Test Environment
         if let Ok(gdoc_key) = std::env::var("GDOC_KEY") {

build/build/src/paths.rs

@@ -33,6 +33,9 @@ ide_ci::define_env_var! {
     /// If Enso-specific assertions should be enabled.
     ENSO_ENABLE_ASSERTIONS, String;
 
+    /// If true, enso tests output will be colored.
+    ENSO_TEST_ANSI_COLORS, String;
+
     /// Can be set to `"espresso"` to enable Espresso interpreter support.
     ENSO_JAVA, String;
 }

distribution/lib/Standard/Test_New/0.0.0-dev/package.yaml

@@ -0,0 +1,10 @@
+name: Test_New
+namespace: Standard
+version: 0.0.0-dev
+license: APLv2
+authors:
+  - name: Enso Team
+    email: [email protected]
+maintainers:
+  - name: Enso Team
+    email: [email protected]

distribution/lib/Standard/Test_New/0.0.0-dev/src/Clue.enso

@@ -0,0 +1,11 @@
+private
+
+## PRIVATE
+type Clue
+    ## PRIVATE
+
+       Represents a clue as to why a test failed
+
+       Arguments:
+       - add_clue: either Nothing or a function which modifies a failure message
+    Value add_clue

distribution/lib/Standard/Test_New/0.0.0-dev/src/Execution_Context_Helpers.enso

@@ -0,0 +1,15 @@
+from Standard.Base import all
+import Standard.Base.Runtime.Context
+
+import project.Test.Test
+
+## PRIVATE
+   Runs the action twice, once with the Output context enabled and once with it
+   disabled, to check that the behaviour is the same regardless of context.
+run_with_and_without_output ~action =
+    Context.Output.with_enabled <|
+        Test.with_clue "(normal mode - Output context enabled) " <|
+            action
+    Context.Output.with_disabled <|
+        Test.with_clue "(dry run - Output context disabled) " <|
+            action