etapi test infrastructure plus a basic note creation test

spec/support/etapi.js

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+const {spawn} = require("child_process");
+const kill  = require('tree-kill');
+
+let etapiAuthToken;
+
+const getEtapiAuthorizationHeader = () => "Basic " + Buffer.from(`etapi:${etapiAuthToken}`).toString('base64');
+
+const PORT = '9999';
+const HOST = 'http://localhost:' + PORT;
+
+function describeEtapi(description, specDefinitions) {
+    describe(description, () => {
+        let appProcess;
+
+        beforeAll(async () => {
+            appProcess = spawn('npm', ['run', 'start-test-server']);
+
+            await new Promise(res => {
+                appProcess.stdout.on('data', data => {
+                    console.log("Trilium: " + data.toString().trim());
+
+                    if (data.toString().includes('Listening on port')) {
+                        res();
+                    }
+                });
+            });
+
+            await fetch(HOST + '/api/setup/new-document', { method: 'POST' });
+
+            const formData = new URLSearchParams();
+            formData.append('password1', '1234');
+            formData.append('password2', '1234');
+
+            await fetch(HOST + '/set-password', { method: 'POST', body: formData });
+
+            etapiAuthToken = (await (await fetch(HOST + '/etapi/auth/login', {
+                method: 'POST',
+                headers: {
+                    "Content-Type": "application/json",
+                },
+                body: JSON.stringify({ password: '1234' })
+            })).json()).authToken;
+        });
+
+        afterAll(() => {
+            console.log("Attempting to kill the Trilium process as part of the cleanup...");
+            kill(appProcess.pid, 'SIGKILL', () => { console.log("Trilium process killed.") });
+        });
+
+        specDefinitions();
+    });
+}
+
+async function getEtapi(url) {
+    const response = await fetch(`${HOST}/etapi/${url}`, {
+        method: 'GET',
+        headers: {
+            Authorization: getEtapiAuthorizationHeader()
+        }
+    });
+    return await processEtapiResponse(response);
+}
+
+async function getEtapiContent(url) {
+    const response = await fetch(`${HOST}/etapi/${url}`, {
+        method: 'GET',
+        headers: {
+            Authorization: getEtapiAuthorizationHeader()
+        }
+    });
+    return await response.text();
+}
+
+async function postEtapi(url, data = {}) {
+    const response = await fetch(`${HOST}/etapi/${url}`, {
+        method: 'POST',
+        headers: {
+            "Content-Type": "application/json",
+            Authorization: getEtapiAuthorizationHeader()
+        },
+        body: JSON.stringify(data)
+    });
+    return await processEtapiResponse(response);
+}
+
+async function putEtapi(url, data = {}) {
+    const response = await fetch(`${HOST}/etapi/${url}`, {
+        method: 'PUT',
+        headers: {
+            "Content-Type": "application/json",
+            Authorization: getEtapiAuthorizationHeader()
+        },
+        body: JSON.stringify(data)
+    });
+    return await processEtapiResponse(response);
+}
+
+async function deleteEtapi(url) {
+    const response = await fetch(`${HOST}/etapi/${url}`, {
+        method: 'DELETE',
+        headers: {
+            Authorization: getEtapiAuthorizationHeader()
+        }
+    });
+    return await processEtapiResponse(response);
+}
+
+async function processEtapiResponse(response) {
+    const json = await response.json();
+
+    if (response.status < 200 || response.status >= 300) {
+        throw new Error("ETAPI error: " + JSON.stringify(json));
+    }
+
+    return json;
+}
+
+module.exports = {
+    describeEtapi,
+    getEtapi,
+    getEtapiContent,
+    postEtapi,
+    putEtapi,
+    deleteEtapi
+};