[MRG]Added test case for method bbox_no_intersection from utils to check no intersection logic

tests/test_utils.py

@@ -0,0 +1,56 @@
+"Test to check intersection logic when no intersection area returned"
+import os
+import sys
+
+from pdfminer.pdfparser import PDFParser
+from pdfminer.pdfdocument import PDFDocument
+from pdfminer.pdfpage import PDFPage
+from pdfminer.pdfpage import PDFTextExtractionNotAllowed
+from pdfminer.pdfinterp import PDFResourceManager
+from pdfminer.pdfinterp import PDFPageInterpreter
+from pdfminer.converter import PDFPageAggregator
+from pdfminer.layout import (
+    LAParams,
+    LTAnno,
+    LTChar,
+    LTTextLineHorizontal,
+    LTTextLineVertical,
+    LTImage,
+    LTTextBoxHorizontal
+)
+
+testdir = os.path.dirname(os.path.abspath(__file__))
+testdir = os.path.join(testdir, "files")
+
+from camelot.utils import bbox_intersection_area
+
+def get_text_from_pdf(filename):
+    "Method to extract text object from pdf"
+    #https://stackoverflow.com/questions/22898145/how-to-extract-text-and-text-coordinates-from-a-pdf-file
+    #https://pdfminer-docs.readthedocs.io/programming.html#performing-layout-analysis
+    document = open(filename, 'rb')
+    #Create resource manager
+    rsrcmgr = PDFResourceManager()
+    # Set parameters for analysis.
+    laparams = LAParams()
+    # Create a PDF page aggregator object.
+    device = PDFPageAggregator(rsrcmgr, laparams=laparams)
+    interpreter = PDFPageInterpreter(rsrcmgr, device)
+    for page in PDFPage.get_pages(document):
+        interpreter.process_page(page)
+        # receive the LTPage object for the page.
+        layout = device.get_result()
+        for element in layout:
+            if isinstance(element, LTTextBoxHorizontal):
+                return element
+
+def test_bbox_intersection_text():
+    """
+    Test to check area of intersection between both boxes when no intersection area returned
+    """
+    filename1 = os.path.join(testdir, "foo.pdf")
+    pdftextelement1 = get_text_from_pdf(filename1)
+    filename2 = os.path.join(testdir, "tabula/12s0324.pdf")
+    pdftextelement2 = get_text_from_pdf(filename2)
+
+    assert bbox_intersection_area(pdftextelement1, pdftextelement2) == 0.0