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test: Add validation for error handling in custom components and utility function #6634

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Original file line number Diff line number Diff line change
@@ -0,0 +1,90 @@
import { expect, test } from "@playwright/test";
import { addCustomComponent } from "../../utils/add-custom-component";
import { awaitBootstrapTest } from "../../utils/await-bootstrap-test";
import { zoomOut } from "../../utils/zoom-out";

test(
"user should be able to see errors on popups when raise an error",
{ tag: ["@release", "@workspace", "@components"] },
async ({ page }) => {
const customComponentCodeWithRaiseErrorMessage = `
# from langflow.field_typing import Data
from langflow.custom import Component
from langflow.io import MessageTextInput, Output
from langflow.schema import Data


class CustomComponent(Component):
display_name = "Custom Component"
description = "Use as a template to create your own component."
documentation: str = "https://docs.langflow.org/components-custom-components"
icon = "code"
name = "CustomComponent"

inputs = [
MessageTextInput(
name="input_value",
display_name="Input Value",
info="This is a custom component Input",
value="Hello, World!",
tool_mode=True,
),
]

outputs = [
Output(display_name="Output", name="output", method="build_output"),
]

def build_output(self) -> Data:
msg = "THIS IS A TEST ERROR MESSAGE"
raise ValueError(msg)
data = Data(value=self.input_value)
self.status = data
return data
`;

await awaitBootstrapTest(page);
await page.getByTestId("blank-flow").click();

await page.waitForSelector(
'[data-testid="sidebar-custom-component-button"]',
{
timeout: 3000,
},
);

await addCustomComponent(page);

await page.getByTestId("fit_view").click();
await page.getByTestId("zoom_out").click();

await page.waitForTimeout(1000);

await page.waitForSelector('[data-testid="title-Custom Component"]', {
timeout: 3000,
});
await page.getByTestId("title-Custom Component").click();

await page.getByTestId("code-button-modal").click();

await page.locator(".ace_content").click();
await page.keyboard.press(`ControlOrMeta+A`);
await page
.locator("textarea")
.fill(customComponentCodeWithRaiseErrorMessage);

await page.getByText("Check & Save").last().click();

await page.getByTestId("button_run_custom component").click();

await page.waitForSelector("text=THIS IS A TEST ERROR MESSAGE", {
timeout: 3000,
});

const numberOfErrorMessages = await page
.getByText("THIS IS A TEST ERROR MESSAGE")
.count();

expect(numberOfErrorMessages).toBeGreaterThan(0);
},
);
12 changes: 12 additions & 0 deletions src/frontend/tests/utils/add-custom-component.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
import { Page } from "playwright/test";

export const addCustomComponent = async (page: Page) => {
let numberOfCustomComponents = 0;

while (numberOfCustomComponents === 0) {
await page.getByTestId("sidebar-custom-component-button").click();
numberOfCustomComponents = await page
.locator('[data-testid="title-Custom Component"]')
.count();
}
};
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