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import { readableStreamToText, spawn } from "bun";
import { expect, it } from "bun:test";
import { readFile, unlink } from "node:fs/promises";
export const runContainer = async (
image: string,
init = "sleep infinity",
): Promise<string> => {
const proc = spawn([
"docker",
"run",
"--rm",
"-d",
"--label",
"modules-test=true",
"--network",
"host",
"--entrypoint",
"sh",
image,
"-c",
init,
]);
const containerID = await readableStreamToText(proc.stdout);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(containerID);
}
return containerID.trim();
};
export const removeContainer = async (id: string) => {
const proc = spawn(["docker", "rm", "-f", id], {
stderr: "pipe",
stdout: "pipe",
});
const exitCode = await proc.exited;
const [stderr, stdout] = await Promise.all([
readableStreamToText(proc.stderr ?? new ReadableStream()),
readableStreamToText(proc.stdout ?? new ReadableStream()),
]);
if (exitCode !== 0) {
throw new Error(`${stderr}\n${stdout}`);
}
};
export interface scriptOutput {
exitCode: number;
stdout: string[];
stderr: string[];
}
/**
* Finds the only "coder_script" resource in the given state and runs it in a
* container.
*/
export const executeScriptInContainer = async (
state: TerraformState,
image: string,
shell = "sh",
before?: string,
): Promise<scriptOutput> => {
const instance = findResourceInstance(state, "coder_script");
const id = await runContainer(image);
if (before) {
await execContainer(id, [shell, "-c", before]);
}
const resp = await execContainer(id, [shell, "-c", instance.script]);
const stdout = resp.stdout.trim().split("\n");
const stderr = resp.stderr.trim().split("\n");
return {
exitCode: resp.exitCode,
stdout,
stderr,
};
};
export const execContainer = async (
id: string,
cmd: string[],
args?: string[],
): Promise<{
exitCode: number;
stderr: string;
stdout: string;
}> => {
const proc = spawn(["docker", "exec", ...(args ?? []), id, ...cmd], {
stderr: "pipe",
stdout: "pipe",
});
const [stderr, stdout] = await Promise.all([
readableStreamToText(proc.stderr),
readableStreamToText(proc.stdout),
]);
const exitCode = await proc.exited;
return {
exitCode,
stderr,
stdout,
};
};
type JsonValue =
| string
| number
| boolean
| null
| JsonValue[]
| { [key: string]: JsonValue };
type TerraformStateResource = {
module: string;
mode: string;
type: string;
name: string;
provider: string;
instances: [
{
attributes: Record<string, JsonValue>;
},
];
};
type TerraformOutput = {
type: string;
value: JsonValue;
};
export interface TerraformState {
outputs: Record<string, TerraformOutput>;
resources: [TerraformStateResource, ...TerraformStateResource[]];
}
type TerraformVariables = Record<string, JsonValue>;
export interface CoderScriptAttributes {
script: string;
agent_id: string;
url: string;
}
export type ResourceInstance<T extends string = string> =
T extends "coder_script" ? CoderScriptAttributes : Record<string, string>;
/**
* finds the first instance of the given resource type in the given state. If
* name is specified, it will only find the instance with the given name.
*/
export const findResourceInstance = <T extends string>(
state: TerraformState,
type: T,
name?: string,
): ResourceInstance<T> => {
const resource = state.resources.find(
(resource) =>
resource.type === type && (name ? resource.name === name : true),
);
if (!resource) {
throw new Error(`Resource ${type} not found`);
}
if (resource.instances.length !== 1) {
throw new Error(
`Resource ${type} has ${resource.instances.length} instances`,
);
}
return resource.instances[0].attributes as ResourceInstance<T>;
};
/**
* Creates a test-case for each variable provided and ensures that the apply
* fails without it.
*/
export const testRequiredVariables = <TVars extends TerraformVariables>(
dir: string,
vars: Readonly<TVars>,
) => {
// Ensures that all required variables are provided.
it("required variables", async () => {
await runTerraformApply(dir, vars);
});
const varNames = Object.keys(vars);
for (const varName of varNames) {
// Ensures that every variable provided is required!
it(`missing variable: ${varName}`, async () => {
const localVars: TerraformVariables = {};
for (const otherVarName of varNames) {
if (otherVarName !== varName) {
localVars[otherVarName] = vars[otherVarName];
}
}
try {
await runTerraformApply(dir, localVars);
} catch (ex) {
if (!(ex instanceof Error)) {
throw new Error("Unknown error generated");
}
expect(ex.message).toContain(
`input variable \"${varName}\" is not set`,
);
return;
}
throw new Error(`${varName} is not a required variable!`);
});
}
};
/**
* Runs terraform apply in the given directory with the given variables. It is
* fine to run in parallel with other instances of this function, as it uses a
* random state file.
*/
export const runTerraformApply = async <TVars extends TerraformVariables>(
dir: string,
vars: Readonly<TVars>,
customEnv?: Record<string, string>,
): Promise<TerraformState> => {
const stateFile = `${dir}/${crypto.randomUUID()}.tfstate`;
const childEnv: Record<string, string | undefined> = {
...process.env,
...(customEnv ?? {}),
};
// This is a fix for when you try to run the tests from a Coder workspace.
// When process.env is destructured into the object, it can sometimes have
// workspace-specific values, which causes the resulting URL to be different
// from what the tests have classically expected.
childEnv.CODER_AGENT_URL = undefined;
childEnv.CODER_WORKSPACE_NAME = undefined;
for (const [key, value] of Object.entries(vars) as [string, JsonValue][]) {
if (value !== null) {
childEnv[`TF_VAR_${key}`] = String(value);
}
}
const proc = spawn(
[
"terraform",
"apply",
"-compact-warnings",
"-input=false",
"-auto-approve",
"-no-color",
"-state",
stateFile,
],
{
cwd: dir,
env: childEnv,
stderr: "pipe",
stdout: "pipe",
},
);
const text = await readableStreamToText(proc.stderr);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(text);
}
const content = await readFile(stateFile, "utf8");
await unlink(stateFile);
return JSON.parse(content);
};
/**
* Runs terraform init in the given directory.
*/
export const runTerraformInit = async (dir: string) => {
const proc = spawn(["terraform", "init"], {
cwd: dir,
});
const text = await readableStreamToText(proc.stdout);
const exitCode = await proc.exited;
if (exitCode !== 0) {
throw new Error(text);
}
};
export const createJSONResponse = (obj: object, statusCode = 200): Response => {
return new Response(JSON.stringify(obj), {
headers: {
"Content-Type": "application/json",
},
status: statusCode,
});
};
export const writeCoder = async (id: string, script: string) => {
await writeFileContainer(id, "/usr/bin/coder", script, {
user: "root",
});
const execResult = await execContainer(
id,
["chmod", "755", "/usr/bin/coder"],
["--user", "root"],
);
expect(execResult.exitCode).toBe(0);
};
export const writeFileContainer = async (
id: string,
path: string,
content: string,
options?: {
user?: string;
},
) => {
const contentBase64 = Buffer.from(content).toString("base64");
const proc = await execContainer(
id,
["sh", "-c", `echo '${contentBase64}' | base64 -d > '${path}'`],
options?.user ? ["--user", options.user] : undefined,
);
if (proc.exitCode !== 0) {
throw new Error(`Failed to write file: ${proc.stderr}`);
}
expect(proc.exitCode).toBe(0);
};
export const readFileContainer = async (id: string, path: string) => {
const proc = await execContainer(id, ["cat", path], ["--user", "root"]);
if (proc.exitCode !== 0) {
console.log(proc.stderr);
console.log(proc.stdout);
}
expect(proc.exitCode).toBe(0);
return proc.stdout;
};