Tests tests tests

- tests for #Copy
- added a “disable” helper to disable specific tests instead of just commenting them out
- “disable” will print out warnings about disabled tests (hopefully with links to corresponding issues)
- cleanup bug repro that has been subsumed into tests

Signed-off-by: dubo-dubon-duponey <dubodubonduponey+github@pm.me>

examples/tests/copy/invalid/cache/main.cue

@@ -0,0 +1,49 @@
+package testing
+
+test1: {
+	string
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "busybox"
+			},
+			{
+				do: "copy"
+				from: [{do: "fetch-container", ref: "alpine"}]
+				src: "/etc/issue"
+				dest: "/"
+			},
+			{
+				do: "export"
+				source: "/issue"
+				format: "string"
+			},
+		]
+	}
+}
+
+test2: {
+	string
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "busybox"
+			},
+			{
+				do: "copy"
+				from: [{do: "fetch-container", ref: "busybox"}]
+				src: "/etc/issue"
+				dest: "/"
+			},
+			{
+				do: "export"
+				source: "/issue"
+				format: "string"
+			},
+		]
+	}
+}

examples/tests/copy/valid/component/main.cue

@@ -0,0 +1,69 @@
+package testing
+
+component: #dagger: compute: [{
+	do: "fetch-container"
+	ref: "alpine"
+}, {
+	do: "exec"
+	args: ["sh", "-c", """
+	printf lol > /id
+	"""]
+	dir: "/"
+}]
+
+test1: {
+	string
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "busybox"
+			},
+			{
+				do: "copy"
+				from: component
+				src: "/id"
+				dest: "/"
+			},
+			{
+				do: "export"
+				source: "/id"
+				format: "string"
+			},
+		]
+	}
+}
+
+test2: {
+	string
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "busybox"
+			},
+			{
+				do: "copy"
+				from: #dagger: compute: [{
+					do: "fetch-container"
+					ref: "alpine"
+				}, {
+					do: "exec"
+					args: ["sh", "-c", """
+					printf lol > /id
+					"""]
+					dir: "/"
+				}]
+				src: "/id"
+				dest: "/"
+			},
+			{
+				do: "export"
+				source: "/id"
+				format: "string"
+			},
+		]
+	}
+}

examples/tests/copy/valid/script/main.cue

@@ -0,0 +1,25 @@
+package testing
+
+test: {
+	string
+
+	#dagger: {
+		compute: [
+			{
+				do: "fetch-container"
+				ref: "busybox"
+			},
+			{
+				do: "copy"
+				from: [{do: "fetch-container", ref: "busybox"}]
+				src: "/etc/issue"
+				dest: "/"
+			},
+			{
+				do: "export"
+				source: "/issue"
+				format: "string"
+			},
+		]
+	}
+}